alluxio.collections

Class TwoKeyConcurrentMap<K1,K2,V,M extends Map<K2,V>>

java.lang.Object

java.util.AbstractMap<K,V>

java.util.concurrent.ConcurrentHashMap<K1,M>

alluxio.collections.TwoKeyConcurrentMap<K1,K2,V,M>

Type Parameters:

K1 - the first key type

K2 - the second key type

V - the value type

M - the type for the inner map

All Implemented Interfaces:

Serializable, ConcurrentMap<K1,M>, Map<K1,M>

public class TwoKeyConcurrentMap<K1,K2,V,M extends Map<K2,V>>
extends ConcurrentHashMap<K1,M>

A two-level concurrent map implementation. Concurrent usage is managed by the outer map. Users can supply the inner map type of their choice.

See Also:

Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	TwoKeyConcurrentMap.TriFunction<A,B,C,R> A function with three arguments.

Nested classes/interfaces inherited from class java.util.concurrent.ConcurrentHashMap

ConcurrentHashMap.KeySetView<K,V>

Nested classes/interfaces inherited from class java.util.AbstractMap

AbstractMap.SimpleEntry<K,V>, AbstractMap.SimpleImmutableEntry<K,V>

Nested classes/interfaces inherited from interface java.util.Map

Map.Entry<K,V>

Constructor Summary

Constructors

Constructor and Description
TwoKeyConcurrentMap(java.util.function.Supplier<M> innerMapCreator)

Method Summary

Modifier and Type	Method and Description
void	addInnerValue(K1 k1, K2 k2, V v)
<R> Set<R>	flattenEntries(TwoKeyConcurrentMap.TriFunction<K1,K2,V,R> fn) Flattens the (key1, key2, value) triples according to the given function.
void	removeInnerValue(K1 k1, K2 k2)

Methods inherited from class java.util.concurrent.ConcurrentHashMap

clear, compute, computeIfAbsent, computeIfPresent, contains, containsKey, containsValue, elements, entrySet, equals, forEach, forEach, forEach, forEachEntry, forEachEntry, forEachKey, forEachKey, forEachValue, forEachValue, get, getOrDefault, hashCode, isEmpty, keys, keySet, keySet, mappingCount, merge, newKeySet, newKeySet, put, putAll, putIfAbsent, reduce, reduceEntries, reduceEntries, reduceEntriesToDouble, reduceEntriesToInt, reduceEntriesToLong, reduceKeys, reduceKeys, reduceKeysToDouble, reduceKeysToInt, reduceKeysToLong, reduceToDouble, reduceToInt, reduceToLong, reduceValues, reduceValues, reduceValuesToDouble, reduceValuesToInt, reduceValuesToLong, remove, remove, replace, replace, replaceAll, search, searchEntries, searchKeys, searchValues, size, toString, values

Methods inherited from class java.util.AbstractMap

clone

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TwoKeyConcurrentMap

public TwoKeyConcurrentMap(java.util.function.Supplier<M> innerMapCreator)

Parameters:

innerMapCreator - supplier for the inner map type

Method Detail

addInnerValue

public void addInnerValue(K1 k1,
                          K2 k2,
                          V v)

Parameters:

k1 - the first key

k2 - the second key

v - the value

removeInnerValue

@Nullable
public void removeInnerValue(K1 k1,
                                       K2 k2)

Parameters:

k1 - the first key

k2 - the second key

flattenEntries

public <R> Set<R> flattenEntries(TwoKeyConcurrentMap.TriFunction<K1,K2,V,R> fn)

Flattens the (key1, key2, value) triples according to the given function.

Type Parameters:

R - the result type of the function

Parameters:

fn - a function to create an entry from the keys and value

Returns:

the set of entries